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arXiv 2104.07039hep-th
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全息BCFTs与通信黑洞

Holographic BCFTs and Communicating Black Holes

Hao Geng, Severin Lüst, Rashmish K. Mishra, David Wakeham

摘要:

本文研究了具有两个边界的二维共形场论与具有两个Karch-Randall膜的三维anti-de Sitter空间之间的AdS/BCFT对偶。我们计算的纠缠熵的一个bipartition的BCFT,在引力方面和场论方面。在有限的温度下,这种纠缠熵表征了两个膜世界黑洞之间的通信,它们通过一个共同的浴池相互耦合。我们发现了一条与么正性一致的Page曲线。引力的结果,计算使用双全息实现的量子极值表面,符合共形场论计算。在零温度下,我们得到了一个有趣的扩展的AdS $_3$ /BCFT $_2$对应。对于中心荷$c$,我们发现在边界条件改变算子(在BCFT的两个边界上插入失配的边界条件)的标度维数$Δ_{\text{bcc}}$的谱中存在一个间隙$(\frac{c}{16},\frac{c}{12})$。依赖于$Δ_{\text{bcc}}$的值,引力对偶要么是一个有缺陷的整体AdS $_3$几何,要么是一个单面黑洞,在这两种情况下都有两个Karch-Randall膜。

英文摘要:

We study the AdS/BCFT duality between two-dimensional conformal field theories with two boundaries and three-dimensional anti-de Sitter space with two Karch-Randall branes. We compute the entanglement entropy of a bipartition of the BCFT, on both the gravity side and the field theory side. At finite temperature this entanglement entropy characterizes the communication between two braneworld black holes, coupled to each other through a common bath. We find a Page curve consistent with unitarity. The gravitational result, computed using double-holographically realized quantum extremal surfaces, matches the conformal field theory calculation. At zero temperature, we obtain an interesting extension of the AdS$_3$/BCFT$_2$ correspondence. For a central charge $c$, we find a gap $(\frac{c}{16},\frac{c}{12})$ in the spectrum of the scaling dimension $Δ_{\text{bcc}}$ of the boundary condition changing operator (which interpolates mismatched boundary conditions on the two boundaries of the BCFT). Depending on the value of $Δ_{\text{bcc}}$, the gravitational dual is either a defect global AdS$_3$ geometry or a single sided black hole, and in both cases there are two Karch-Randall branes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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